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E. B. RUDOLPH, Deod.

W. E. BOULTER, Administrator. LEADING-IN DEVICE POR OVBREDGE SEWING MAGHINBS.

No. 449,927'. Patented Apr. 7, 1891.`

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(Model.) E I 2 Sheets-Sheet 2.

E. B. RUDOLPH, Deed.

W. E'. BOULTER, Administrator. LEADING-IN DEVICE FOR OVEREDGE SEWING MACHINES.

No. 449,927. PatentedApr. 7,1891.

f ff @MMI UNITED STATES` PATENT EETCE.

IVILLIAM E. BOULTER, OF WASHINGTON, DISTRICT OF COLUMBIA, ADMINIL- TRATOR OF ERNST B. RUDOLPH, DEOEASED.

LEADING-IN DEVICE FOR OVEREDGE SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 449,927, dated Aprilv 7, 1891.

Application iiled October 30, 1889. Serial No. 328,723. (Model.) Patented in England March 22, 1884, No. 5,330, and in Germany March 30, 1884, No. 30,463.

1o No. 5,330, dated March 22, 1884. and in Ger-V many, No. 30,463, dated March '30, 1884,) of

which the following is a full and clear specifly cation.

The invention relates to sewing-machines of that class adapted to produce a broad folded welt or doubleY edging for out goods, such as the edging of jackets, drawers, hose, dac.; and the invention relates more particularly to devices adapted to be attached to 2o such machines for properly folding the edge of the fabric and leading-in or guiding the latter between the feed-disks of the machine; and the object of the invention is to provide aleading-in device for sewing-machineswhich is of simple and inexpensive construction and well adapted for the purpose in view.

The invention consists in the construction, arrangement, and combination of parts constituting theimproved device, all as hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claim.

In the drawings, Figure 1 is a front view of the leading-in device; Fig. 2, a rear view 3 5 thereof; Fig. 3, a vertical section of the same on the line A B of Fig. 1; Fig. et, a horizontal section on line C D of Fig. 2; Fig. 5, an elevation of the guide-plate d of the device; Fig.

G, an end view thereof; Fig. 7, an elevation of the guide-plate a; Fig. S, a like view of the guide-plate d', and Fig. 9 an edge view thereof;

Fig. 10, an elevation of the spring g. Fig. l1

shows an elevation of a sewing-machine provided with the improved leading-in device.

In Fig. 11 of the above drawings I have shown the leading-in device in connection with a sewing-machine similar to that shown in two pending applications for patentsiiled October 30, 1889, and November 2, 1889, and Y bearing the Serial Nos. 328,722 and 329,081,

respectively, and inasmuch as the construction and operation of said sewing-machine are fully set forth in said applications I do not describe thesame in detail herein, except in so far as this may be necessary for a proper understanding of the mode of arranging and combining the leading-in device therewith.

a. indicates a plate provided with the upwardly-projecting tongue, which is secured b v means of screws a2 to an operating-arm or 6o lever B, which at one end is pivoted upon a pivot-screw B to the lower end of a bracket B2, which is secured to the head-block or frame O of the machine. To said bracket B2 is secured a spring-plate O', curved, as shown, 65 the longer leg c of which is provided with two studs c2, with which is adapted to engage the Linder edge of the ylever B. It will be seen that t-he plate a can be readily swung upwardly by means of the lever B until the lat- 7o ter engages the upper stud c2, in which position the device is held until the fabric has been properly inserted and adjusted in the device, after which the plate (and parts connected therewith) can be swung downwardly again into the position shown in Fig. 11, with the lever B engaging the lower stud.

The plate d is provided at its rear end with a twisted or helical projection b. To the plate d is secured aplate a', which is likewise 8o provided with a twisted or helical projection c, which is so located and positioned with respect to the helical projection b as to leave a narrow opening or space between them to admit of the insertion and passage therethrough of one edge of the fabric, and owing to the twist said edge of the fabric is lapped or turned over upon itself to form a welt. The plate a is also provided with a rounded projection d, (see Fig. 2,) the latter serving to unroll the 9o edge of the fabric. To thelower end of plate a is also secured a plate e, which is provided with a rounded bar f, extending in the direction of the feed, and which bar serves to prevent the fabric from passing up too high.

To the plate a is secured a spring-plate g, curved, as shown, and extending around the bar f and up to a level with the upper edge of the feed-disks D of the machine. This spring-plate g has a rounded end c', which Ioo v low and in proximity to the twisted projections h c, and serves to maintain the lapped or turned-over edge of the fabric in such position until it enters between the feed-disks.

The entire device is so arranged and positioned upon the machine that the twisted projections will, when the device is in vits operative position, Fig. ll, lie in a horizontal plane corresponding with that of the feeddisks and in a vertical plane passing through the central longitudinal axes of the said projections (or nearly so) and the point of contact of the feed-disks, whereby the fabric as it leaves the said projections will be in the proper position to pass between the said disks. j

The operation of the leading-in device may be briefly described as follows: The operator takes the fabric and causes it to assume a substantial U shape and passes it into the device in such manner that one portion of the fabric will lie between the short leg of plate g and one side of plate e and the other portion (whose edge is to be turned over into a welt) lying between the other side of plate c and the longer leg of plate y. The fabric is then pulled by the hand rearwardly to cause the edge which is to be turned over to pass in between the two helical projections b c, and as the fabric is continued to be pulled rearwardly the said edge of the fabric will be caused to follow the twist of the projections, and consequently will be turned over upon itself by the time it reaches the rear end of the projections. The operator continues to pull the fabric rearwardly until the lapped-over edge of the fabric passes between the feed-disks, after which the operation of sewing can be commenced and continued, the edge of the fabric being continued 5o to be folded over as it is drawn rearwardly by the feed-disks between the-projections b c. The ends t' of plate g and the plate d serve to maintain one portion of the fabric in proper position-t'. e., in close relation to the 55 folded-over edge as it emerges from between the projections, and thus render the operation of sewing said folded edge to the said portion of the fabric a certain one. The tongue u of bar t, owing to its location with 6o reference to the projections b c, serves to keep the edge of the fabric lapped over after it leaves the projections unl il it passes between the feed-disks.

Having now de scribed the invention,what is claimed, and desired to be secured by Letters Patent of the United States, is-

In leading-in apparatus for folding hollow seams or welts on knitted goods, the combination of the main plate a with a twisted pro- 7o jection b, a second plate d', having likewisea twisted projection c and a rounded projection d, gage-barf, a-nd covering spring g.

In witness whereof I have hereunto set my hand in presence of two witnesses.

WILLIAM E. BOULTER, Administrator of Ernst B. R uclolph, deceased.

Witnesses.

H. F. RILEY, H. B. KINGSBERY. 

